<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="课程ID" prop="courseId">
        <el-input
          v-model="queryParams.courseId"
          placeholder="请输入课程ID"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="学生ID" prop="studentId">
        <el-input
          v-model="queryParams.studentId"
          placeholder="请输入学生ID"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="课程名称" prop="courseName">
        <el-input
          v-model="queryParams.courseName"
          placeholder="请输入课程名称"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="学生姓名" prop="studentName">
        <el-input
          v-model="queryParams.studentName"
          placeholder="请输入学生姓名"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="选课时间" prop="selectTime">
        <el-date-picker clearable
          v-model="queryParams.selectTime"
          type="date"
          value-format="yyyy-MM-dd"
          placeholder="请选择选课时间">
        </el-date-picker>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['course:selection:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['course:selection:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['course:selection:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['course:selection:export']"
        >导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="selectionList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="选课记录ID" align="center" prop="recordId" />
      <el-table-column label="课程ID" align="center" prop="courseId" />
      <el-table-column label="学生ID" align="center" prop="studentId" />
      <el-table-column label="课程名称" align="center" prop="courseName" />
      <el-table-column label="学生姓名" align="center" prop="studentName" />
      <el-table-column label="选课时间" align="center" prop="selectTime" width="180">
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.selectTime, '{y}-{m}-{d}') }}</span>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['course:selection:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['course:selection:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    
    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改选课记录对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="课程ID" prop="courseId">
          <el-input v-model="form.courseId" placeholder="请输入课程ID" />
        </el-form-item>
        <el-form-item label="学生ID" prop="studentId">
          <el-input v-model="form.studentId" placeholder="请输入学生ID" />
        </el-form-item>
        <el-form-item label="课程名称" prop="courseName">
          <el-input v-model="form.courseName" placeholder="请输入课程名称" />
        </el-form-item>
        <el-form-item label="学生姓名" prop="studentName">
          <el-input v-model="form.studentName" placeholder="请输入学生姓名" />
        </el-form-item>
        <el-form-item label="选课时间" prop="selectTime">
          <el-date-picker clearable
            v-model="form.selectTime"
            type="date"
            value-format="yyyy-MM-dd"
            placeholder="请选择选课时间">
          </el-date-picker>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listSelection, getSelection, delSelection, addSelection, updateSelection } from "@/api/course/selection"
import { getSelectionByCourseId } from "@/api/course/selection"
import { listRecords, getRecords, delRecords, addRecords, updateRecords, getRecordsByTeacherId } from "@/api/course/records"

export default {
  name: "Selection",
  data() {
    return {
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 选课记录表格数据
      selectionList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        courseId: null,
        studentId: null,
        courseName: null,
        studentName: null,
        selectTime: null
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        courseId: [
          { required: true, message: "课程ID不能为空", trigger: "blur" }
        ],
        studentId: [
          { required: true, message: "学生ID不能为空", trigger: "blur" }
        ],
      }
    }
  },
  created() {
    // if (this.$store.state.user.roles.includes('teacher')) {
    //   // 教师只能查看自己课程的选课记录
    //   // this.queryParams.courseId = this.$store.state.user.courseId; // 假设user信息中包含courseId
    //     this.queryParams.courseIds = this.$store.state.user.courses?.map(c => c.id) || [];
    //   console.log('当前查询参数:', this.queryParams.courseIds);
    // } else {
    //   // 管理员保留原有查询参数
    //   delete this.queryParams.courseId;
    // }
    console.log('当前用户信息:', JSON.parse(JSON.stringify(this.$store.state.user)));
    if (this.$store.state.user.roles.includes('teacher')) {
      this.teacherCourses = this.$store.state.user.courses || [];
      console.log('教师课程列表:', this.teacherCourses);
    }

    this.getList()
  },
  methods: {
    /** 查询选课记录列表 */
    // getList() {
    //   this.loading = true
    //   listSelection(this.queryParams).then(response => {
    //     this.selectionList = response.rows
    //     this.total = response.total
    //     this.loading = false
    //   })
    // },
    // getList() {
    //   this.loading = true;
    //   console.log('当前查询参数:', JSON.stringify(this.queryParams));
      
    //   const apiCall = this.$store.state.user.roles.includes('admin') 
    //     ? listSelection(this.queryParams) 
    //     : getSelectionByCourseId(this.queryParams.courseId);

    //   apiCall
    //     .then(response => {
    //       console.log('完整API响应:', response);
    //       const data = response.data || response;
    //       this.selectionList = data.rows || data || [];
    //       this.total = data.total || data.length || 0;
    //     })
    //     .catch(error => {
    //       console.error('请求失败详情:', error);
    //       this.$modal.msgError(`数据加载失败: ${error.message}`);
    //     })
    //     .finally(() => {
    //       this.loading = false;
    //     });
    // },
    async getList() {
      this.loading = true;
      
      if (this.$store.state.user.roles.includes('teacher')) {
        try {
          // 先获取教师课程列表
          const coursesResponse = await getRecordsByTeacherId(this.$store.state.user.id);
          console.log('coursesResponse:', coursesResponse);

          // this.teacherCourses = coursesResponse.data?.rows || [];
          this.teacherCourses = coursesResponse.rows || [];
          console.log('API获取的教师课程:', this.teacherCourses);

          // 获取所有课程的选课记录
          // const selectionResponses = await Promise.all(
          //   this.teacherCourses.map(course => {
          //     return getSelectionByCourseId(course.courseId)
          //       .then(res => {
          //         console.log(`课程${course.courseId}返回数据:`, res.data);
          //         return {
          //           rows: res?.data?.rows || res?.rows || [],
          //           courseId: course.courseId
          //         };
          //       })
          //       .catch(error => {
          //         console.error(`课程${course.courseId}请求失败:`, error);
          //         return { rows: [] };
          //       })
          //   })
          // );
          const selectionResponses = await Promise.all(
            this.teacherCourses.map(course => {
              return getSelectionByCourseId(course.courseId)
                .then(res => {
                  console.log(`课程${course.courseId}返回数据:`, res.data);
                  return {
                    rows: Array.isArray(res.data) ? res.data : [],
                    courseId: course.courseId
                  };
                })
                .catch(error => {
                  console.error(`课程${course.courseId}请求失败:`, error);
                  return { rows: [] };
                })
            })
          );

          console.log('selectionResponses:', selectionResponses);
          // this.selectionList = selectionResponses.flatMap(res => {
          //   const rows = res.data || res.rows || [];
          //   return rows.map(row => ({
          //     ...row,
          //     courseId: res.courseId
          //   }));
          // });
          this.selectionList = selectionResponses.flatMap(res => 
            res.rows.map(row => ({
              ...row,
              courseId: res.courseId
            }))
          );
          this.total = this.selectionList.length;
          console.log('最终选课列表:', this.selectionList);
        } catch (error) {
          console.error('整体流程错误:', error);
          this.$modal.msgError('数据加载失败');
        } finally {
          this.loading = false;
        }
      } else {
        // 管理员模式：原有逻辑
        listSelection(this.queryParams).then(response => {
          const data = response.data || response;
          this.selectionList = data.rows || data || [];
          this.total = data.total || data.length || 0;
        }).catch(error => {
          console.error('请求失败详情:', error);
          this.$modal.msgError(`数据加载失败: ${error.message}`);
        }).finally(() => {
          this.loading = false;
        });
      }
    },
    // 取消按钮
    cancel() {
      this.open = false
      this.reset()
    },
    // 表单重置
    reset() {
      this.form = {
        recordId: null,
        courseId: null,
        studentId: null,
        courseName: null,
        studentName: null,
        selectTime: null
      }
      this.resetForm("form")
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1
      this.getList()
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm")
      this.handleQuery()
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.recordId)
      this.single = selection.length!==1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset()
      this.open = true
      this.title = "添加选课记录"
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset()
      const recordId = row.recordId || this.ids
      getSelection(recordId).then(response => {
        this.form = response.data
        this.open = true
        this.title = "修改选课记录"
      })
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.recordId != null) {
            updateSelection(this.form).then(response => {
              this.$modal.msgSuccess("修改成功")
              this.open = false
              this.getList()
            })
          } else {
            addSelection(this.form).then(response => {
              this.$modal.msgSuccess("新增成功")
              this.open = false
              this.getList()
            })
          }
        }
      })
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const recordIds = row.recordId || this.ids
      this.$modal.confirm('是否确认删除选课记录编号为"' + recordIds + '"的数据项？').then(function() {
        return delSelection(recordIds)
      }).then(() => {
        this.getList()
        this.$modal.msgSuccess("删除成功")
      }).catch(() => {})
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('course/selection/export', {
        ...this.queryParams
      }, `selection_${new Date().getTime()}.xlsx`)
    }
  }
}
</script>
